+ /**
+ * Update the cache of whether or not a given settings key persists on disk
+ *
+ * @param normKey Normalized settings key ID
+ * @param exists True if key exists, otherwise false
+ */
+ inline void setCacheKeyPersisted(const QString &normKey, bool exists)
+ {
+ settingsKeyPersistedCache[normKey] = exists;
+ }
+
+
+ /**
+ * Check if the given settings key ID persists on disk (rather than being a default value)
+ *
+ * @see Settings::localKeyExists()
+ *
+ * @param normKey Normalized settings key ID
+ * @return True if key exists and persistence has been cached, otherwise false
+ */
+ inline const bool &cacheKeyPersisted(const QString &normKey)
+ {
+ return settingsKeyPersistedCache[normKey];
+ }
+
+
+ /**
+ * Check if the persistence of the given settings key ID has been cached
+ *
+ * @param normKey Normalized settings key ID
+ * @return True if key persistence has been cached, otherwise false
+ */
+ inline bool isKeyPersistedCached(const QString &normKey)
+ {
+ return settingsKeyPersistedCache.contains(normKey);
+ }
+
+